The CPSC said that the alarms have a 'wave' feature that lets users stop their warning bleeps by "vigorously waving an arm near the unit that triggered the alarm". It added that the Nest Wave alarms are shipped with the Wave feature set in the On position.

We have asked Google to comment on this. The CPSC said that users should stop using the alarms until further notice. It added that a repair will be sent out as an electronic update.

This update will disable the Wave feature, and will be sent out automatically to units that are connected to a wireless network. If you have a Nest Wave, burn your toast and wave a lot, it would be wise to connect the unit to the internet "immediately".

"Nest account should immediately confirm the receipt of an automatic repair that disabled the Nest Wave feature by going to Nest Sense on their Nest account mobile or web application and ensuring that the button for Nest Wave is set to 'off' and grayed out," it added. "No further action is required and consumers can continue to use their devices." µ